Etching of titanium for microscopic examination

etching of titanium alloy Ti6Al4V methods. the answer should include solution necessary for etching and its chemical composition the etching method must make the alloy suitable for microscopic examination, and other related examinations

Also, I want to ask about the phase diagram difference in the same alloy a copy of phase diagram changes which may be occur and how Raman spectroscopy analysis may be done

The Struers website has an Application Note called Metallographic Preparation of Titanium which should answer many of your questions. You can obtain this document by using the following link:

http://www.struers.com/resources/elements/12/9390/Application%20Notes%20titanium%20English.pdf

For more information about the various phases present in Titanium alloys, review the section called Basic Titanium Metallurgy of the RMI Titanium Alloy Guide:

http://www.rti-intl.com/products%20&%20services/index_ps.htm
Then click on Titanium Alloy Guide

I am unfamiliar with the use of Raman Spectroscopy as an analysis technique with titanium alloys.